The invention provides conspicuity devices and methods. A first embodiment includes a tool band and an electroluminescent lamp adapted and configured to admit light having an advantageous spectral energy distribution. The device can have many additional and/or alternative passive and/or active conspicuity features, such as lasers, lamps, photoluminescent and retroreflective materials, among others.
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19. An electroluminescent lamp comprising:
a) at least one elongate electroluminescent element defining a longitudinal axis and a transverse axis, the electroluminescent element having a plurality of relatively wide emitting segments disposed along the longitudinal axis connected to each other by a relatively narrow emitting segment; and
b) an elongate fire-resistant encasement adapted and configured to house the electroluminescent lamp, wherein the encasement includes a plurality of layers of material bonded together to define a compartment between the layers adapted and configured to receive the electroluminescent lamp.
1. A tool band having a first end and a second end, comprising:
a) an elongate fire resistant webbing portion;
b) a fire resistant elastic portion attached to the webbing portion; and
c) a coupling portion adapted and configured to selectively attach the first end of the band to the second end of the band; and
d) an electroluminescent lamp having at least one elongate electroluminescent element defining a longitudinal axis and a transverse axis, the electroluminescent element having a plurality of relatively wide emitting segments disposed along the longitudinal axis connected to each other by a relatively narrow emitting segment.
2. The tool band of
3. The tool band of
4. The tool band of
5. The tool band of
6. The tool band of
7. The tool band of
8. The tool band of
9. The tool band of
10. The tool band of
11. The tool band of
12. The tool band of
15. The tool band of
16. The tool band of
17. The tool band of
18. The tool band of
20. The electroluminescent lamp of
21. The electroluminescent lamp of
22. The electroluminescent lamp of
23. The electroluminescent lamp of
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This application is related to and claims priority to U.S. Provisional Patent Application Ser. No. 60/757,623 filed Jan. 10, 2006, U.S. Provisional Patent Application Ser. No. 60/772,073 filed Feb. 10, 2006, U.S. Provisional Patent Application Ser. No. 60/795,332 filed Apr. 26, 2006, U.S. Provisional Patent Application Ser. No. 60/925,175 filed Apr. 19, 2007, U.S. Provisional Patent Application Ser. No. 60/947,801, filed Jul. 3, 2007, U.S. Provisional Patent Application Ser. No. 60/972,227, filed Sep. 13, 2007 and U.S. Provisional Patent Application Ser. No. 60/975,140, filed Sep. 25, 2007. This application is a continuation-in-part of and claims priority to International Patent Application No. PCT/US07/00653, filed Jan. 10, 2007. Each of the aforementioned patent applications is incorporated by reference herein in its entirety.
1. Field of the Invention
The present invention relates to a conspicuity device and method for providing ready identification of an object or individual. Particularly, the present invention is directed to a conspicuity device and method that is capable for providing ready identification of an object or individual in an environment of reduced visibility such as darkness/and or smoke.
2. Description of Related Art
A variety of devices are generally known in the art for providing enhanced visibility of objects or individuals. Of such devices, many are directed to devices and systems for use in smoky and/or dark environments.
It can be appreciated that lighting devices on helmets, for example, have been in use for many years. Typically, such lighting devices are comprised of conventional flashlights and similar battery-operated warning devices that project light in a unidirectional beam. The main problem with such conventional devices include, for example, the size of the devices and cumbersome power supply attachments that frequently accompany them. Another significant problem with such conventional devices are that flashlights and light projecting devices tend to generate light only in the visible region, particularly white light. Such light typically reflected, for example, in smoky conditions and even absorbed by particles of haze and smoke.
Other passive devices have also been used, such as reflective materials and the like. Such passive devices are of limited utility, as they do not emit any light in low visibility conditions or complete darkness.
In short, while these devices may be suitable for the particular purpose to which they address, they are not as suitable for a device that will enable, for example, individuals wearing helmets working in various types of low visibility conditions, to be seen by others.
Furthermore, utility straps or tool bands for helmets and a variety of other similar devices have been used for years. Typically a helmet utility strap or helmet tool band is made of a flexible material that conforms to the outer shell of a helmet. The common design which is found, is a one piece circular band or strap which is made of a rubber or elastic material. However, such bands suffer from a number of deficiencies.
Significant problems with conventional utility straps or tool bands for helmets include their inability, for example: (1) to adjust to various types of helmets, (2) to open or close, (3) to mount on a helmet securely, (4) to provide for the safe keeping of tools, (5) to offer heat and flame resistance, and (6) to offer effective conspicuity in potential hazardous situations where low visibility prevents one from being seen.
As can be seen, there still remains a continued need in the art for improved devices and methods for enhancing visibility of individuals, such as emergency workers such as firemen. There also remains a need in the art for such devices that are inexpensive and easy to make. The present invention provides a solution for these and other problems, as described herein.
The purpose and advantages of the present invention will be set forth in and become apparent from the description that follows. Additional advantages of the invention will be realized and attained by the methods and systems particularly pointed out in the written description and claims hereof, as well as from the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the invention, as embodied herein, in accordance with one aspect, the invention includes a tool band having a first end and a second end. The tool band further includes an elongate fire resistant webbing portion, a fire resistant elastic portion attached to the webbing portion, and a coupling portion adapted and configured to selectively attach the first end of the band to the second end of the band.
In accordance with further aspects of the invention, the webbing portion of the tool band may be made at least in part from aramid fibers. For example, the webbing portion may be made at least in part from KEVLAR material. If desired, the elastic portion may also be made at least in part from aramid fibers. For example, the elastic portion may be made at least in part from NOMEX material. One or more loops can be provided for the tool band that are attached to the webbing portion. The loop(s) are preferably adapted and configured to hold an object. The loops may be made from an elastic material, such as NOMEX material. Each of the loops define a passage therethrough. The passages may be generally transverse to the webbing portion of the tool band, parallel to the tool band or angled obliquely with respect to the tool band. The ends of the tool band may be attached to one another in a variety of manners, including hook and loop fasteners (e.g., Velcro® material), buckle mechanisms (e.g., Fastex buckles made from nylon), snaps, buttons, hooks and the like.
In accordance with a further aspect of the invention, the tool band can be further provided with a conspicuity device attached thereto. The conspicuity device can include passive retroreflective materials such as REFLEXITE® materials, materials commercially available from Corporation (Springfield, Mass.) or other suitable microprismatic materials, and/or retroreflective photoluminescent materials that glow in the dark when properly charged. If desired, the conspicuity device can additionally or alternatively include one or more lighting devices. For example, suitable lighting devices can include one or more electroluminescent elements, one or more lasers and one or more work lights. The electroluminescent lamp may be affixed to the webbing and be adapted and configured to emit light. Preferably, the lamp has at least one elongate electroluminescent element defining a longitudinal axis and a transverse axis, the electroluminescent element having a plurality of relatively wide emitting segments disposed along the longitudinal axis connected to each other by a relatively narrow emitting segment. Any suitable laser can also be provided in the tool band, for example, for pointing at objects and/or for acting as a location indicator of the wearer.
The tool band preferably is also provided with a power source attached to the band. The power source is preferably adapted and configured to power one or more of the lighting devices. The work light can be any one of a suitable number of different devices. In accordance with a preferred embodiment, the work light is an LED lamp. Even more preferably, the LED lamp has a light output between about 500 and about 1500 candlepower, preferably about 1000 candlepower. The work light can be a removable flashlight that may be rechargeable, or may be integrally formed with the tool band, and be amiably mounted, as desired.
In further accordance with the invention, the tool band can have one or more suitable tools mounted therein. Such tools can include, for example, one or more door wedges, lighting mechanisms, and wrenches, among others. If desired, a communication device, such as a radio or portable telephone can also be mounted in or integrated with the tool band.
The invention also provides a conspicuity device. The device includes an electroluminescent lamp adapted and configured to emit light, the lamp having at least one elongate electroluminescent element defining a longitudinal axis and a transverse axis, the electroluminescent element having a plurality of relatively wide emitting segments disposed along the longitudinal axis connected to each other by a relatively narrow emitting segment.
In further accordance with the invention, the elongate element can be continuous or interrupted and formed from one or more pieces of material. In accordance with one embodiment of the invention, the relatively narrow emitting segment may have a width along the transverse axis that is less than the width along the transverse axis of at least one of the relatively wide emitting segments. The plurality of relatively wide emitting segments may have an average width along the transverse axis between about three quarters of an inch and about one eighth of an inch. More preferably, the plurality of relatively wide emitting segments may have an average width along the transverse axis between about one half of an inch and about one quarter of an inch. Even more preferably, the plurality of relatively wide emitting segments have an average width along the transverse axis of about one quarter of an inch.
In accordance with a further aspect of the invention, the relatively narrow emitting segment may have an average width along the transverse axis that is between about three quarters and about one quarter the width of an adjacent relatively wide emitting segment. If desired, the relatively narrow emitting segment may have an average width along the transverse axis that is about half the width of an adjacent relatively wide emitting segment.
By way of further example, the relatively narrow emitting segment may have a length along the longitudinal axis that is less than the length along the longitudinal axis of at least one of the relatively wide emitting segments. If desired, the plurality of relatively wide emitting segments have an average length along the longitudinal axis between about three inches and about one half of an inch. More preferably, the plurality of relatively wide emitting segments may have an average length along the longitudinal axis between about two inches and about one inch. Most preferably, the plurality of relatively wide emitting segments have an average length along the longitudinal axis of about one and one half inches.
In accordance with still another aspect of the invention, the relatively narrow emitting segment can have an average length along the longitudinal axis that is between about three quarters and about one quarter the length of an adjacent relatively wide emitting segment. More preferably, the relatively narrow emitting segment has an average length along the longitudinal axis that is about one third the length of an adjacent relatively wide emitting segment.
In accordance with still a further aspect of the invention, the device preferably further includes a plurality of electrical conductors operably coupled to the electroluminescent element. Additionally, the device also may include a power source operably coupled to the electroluminescent element by way of the plurality of electrical conductors. The power source preferably includes at least one battery operably coupled to the electrical conductors. If desired, the battery may be rechargeable and/or removable from the device. In accordance with one embodiment of the invention, the device can emit light for more than about eight hours before the battery requires charging or replacement. In accordance with another embodiment, the device can emit light for more than about ten hours during an operating mode that provides constant illumination. In accordance with still another embodiment of the invention, the device can emit light for more than about forty hours during an operating mode that provides intermittent illumination.
In accordance with another aspect of the invention, the power source can further include an electrical inverter interposed in a circuit between the battery and the electroluminescent element. Preferably, the power source is operably coupled to at least one of the electrical conductors by a switch. The switch can be adapted and configured to permit selection of at least one operating mode of the device. For example, by using the switch, various operating modes such as constant and intermittent operation can be selected.
In yet further accordance with the invention, the device may include an encasement adapted and configured to house the electroluminescent element. In accordance with one embodiment, the encasement includes a plurality of layers of material bonded together to define a compartment between the layers adapted and configured to receive the electroluminescent element. The compartment may be defined by a seal about its periphery. The seal may include at least one of a heat seal, a solvent weld, an ultrasonic weld, stitching and an adhesive seal, among others. At least one layer of the encasement includes polymeric material. Preferably, all layers of the encasement include some amount of polymeric material. Preferably, the polymeric material is fire resistant. A number of suitable polymeric materials can be used, including various vinyl materials.
The encasement preferably includes a polymeric base layer upon which the electroluminescent element is positioned. A clear lens layer is then affixed to the base layer, trapping the electroluminescent element between the two layers. The lens layer is preferably formed from a vinyl material. Even more preferably, the vinyl lens layer is heat resistant, and permits passage of visible light and ultraviolet light therethrough.
In accordance with a further aspect of the invention, the polymeric base layer preferably includes retroreflective material. For example, the base polymeric base layer may include a plurality of microprism reflective elements integrally bonded to the polymeric material. In accordance with one embodiment, the polymeric base layer has a retroreflective value in excess of 350 cd/lux/m2 (cpl) when measured in accordance with NFPA 1971, 2000 edition. Preferably, the layer has a retroreflective value of about 650 cd/lux/m2 (cpl). The polymeric base layer may also be bonded to a fabric-reinforced polymeric backing material. For example, the polymeric base layer can be formed from REFLEXITE® material, such as described in U.S. Pat. Nos. 4,801,193, 4,244,683, 4,243,618, 4,202,600, 4,555,161, 5,171,624, 5,264,063 and 5,229,882. All of these patents are incorporated by reference herein in their entireties.
If desired, the polymeric base layer of the encasement may additionally or alternatively include photoluminescent retroreflective material. Such materials are described, for example, in U.S. Pat. Nos. 5,415,911, 6,159,878, 6,569,786, and 6,656,566. Each of these patents is incorporated by reference herein in its entirety. The photoluminescent retroreflective material is preferably charged by exposure to ultraviolet light. Preferably, the retroreflective photoluminescent material includes photoluminescent elements including strontium aluminate. Other materials, such as zinc sulfide photoluminescent elements may also be used. Comparatively speaking, strontium aluminate retroreflective material tends to have a higher brightness and longer afterglow, which may be desirable in certain applications. These photoluminescent crystals (e.g., strontium aluminate) may be are cast into a polymeric material such as a pliable PVC vinyl, and used in a manner similar to the REFLEXITE® material.
In further accordance with one embodiment of the conspicuity device provided by the invention, the electroluminescent lamp can be adapted and configured to emit a majority of photons in a wavelength range of about 500 nm. The spectral energy distribution of certain embodiments of the lamp demonstrate a peak distribution at about 500 nm, extremely close to the peak sensitivity of the human eye in darkness of about 507 nm. As such, these embodiments of the invention are particularly tuned for maximum performance in a dark and/or smoky environment. As such, while the electroluminescent lamp is adapted and configured to emit generally blue light, a significant amount of generally green wavelengths are also preferably present. Such emission can be ensured by selecting an appropriate frequency for powering the electroluminescent lamp, as described herein.
In further accordance with the invention, effective peak intensities for the lamp are between about 0.05 Candela and 0.15 Candela. In accordance with one example, the peak intensity for the lamp is about 0.13 Candela. Surprisingly, such a lamp is nonetheless highly visible in a dark, smoky environment. In accordance with a further aspect of the invention, the lamp is adapted and configured to emit sufficient light to permit visibility of the device from a distance of about three to six fee in a black smoky environment.
In still further accordance with the invention, the elongate electroluminescent element is a monolithic structure formed from a single sheet of electroluminescent material. In accordance with one aspect of the invention, the lamp can be adapted and configured to operate in a first operating mode wherein the lamp is on constantly and a second operating mode wherein the lamp blinks. If desired, the lamp can be adapted and configured to transmit a distress signal in the second operating mode.
In accordance with still a further aspect of the invention, an article of clothing, such as a helmet, jacket, pair of trousers and/or footwear is provided. Accordingly, a helmet may be provided including a generally rigid protective shell, and an electroluminescent conspicuity device as described herein. In accordance with one embodiment of the invention, the conspicuity device is disposed about less than the entire periphery of the helmet. For example, the conspicuity device may be disposed about more than about 40% and less than about 90% of the periphery of the helmet. Preferably, the conspicuity device is not disposed proximate the front of the helmet in order to reduce exposure of the conspicuity device to heat of a fire in use. Accordingly, the helmet may be a firefighter's helmet.
The invention also provides a conspicuity device including a band adapted and configured to be mounted to an object and a laser beacon mounted on the band.
In further accordance with the invention, an electroluminescent lamp may be mounted on the band. The electroluminescent lamp may be similar to those described above, among others. A power source may also be mounted on the band for powering at least one of the lamp and the beacon. If desired, the conspicuity device may further include a LED work light mounted on the band. If desired, the power source may be adapted and configured to power at least one of the lamp, the beacon and the work light. By way of further example, if desired, the conspicuity device may further include a global positioning device.
In still further accordance with the invention, the laser beacon of the conspicuity device may be mounted in a loop attached to the band. If desired, the laser beacon may be rotatably mounted to the band. By way of further example, the laser beacon may be pivotally mounted and weighted (e.g., by a pendulum) to direct a beam vertically upward when in use to form a signal beacon. The laser can be adapted and configured to emit light in a variety of wavelengths. For example, the laser can emit, green, blue or violet lights, among others.
The beam of the laser beacon can have a variety of shapes. For example, the laser can emit a collimated beam of light or a diverging beam of light, as desired. The beam is preferably not too narrow. For example, in accordance with one embodiment, the laser is preferably adapted and configured to emit a beam having a diameter in excess of one centimeter at a point in the beam more than twenty feet from the laser.
In further accordance with the invention, the laser can include a laser generator adapted and configured to generate a substantially parallel beam, and a first lens downstream from the laser generator adapted and configured to cause the parallel beam to diverge as it passes through the first lens. If desired, the laser can further include a housing for holding the first lens and laser generator, and a second lens disposed in the path of the beam downstream from the first lens. The second lens is preferably adapted and configured to cause the diverging beam passing from the first lens to be substantially collimated. If desired, the distance along the beam path between the first lens and second lens can be adjusted to change the diameter of the beam passing from the second lens. For example, the distance between the lenses may be adjusted by rotating a portion of the housing. Accordingly, the diameter of the beam leaving the laser can be adjusted from a diameter of about one eighth of an inch to a diameter of about one half inch.
In still further accordance with the invention, the housing of the conspicuity device may define a compartment for receiving a battery for powering the laser. If desired, the laser may also be configured to operate in a plurality of operating modes. For example, the laser can be operated in a first operating mode wherein the laser is on constantly, and a second operating mode wherein the laser blinks. In accordance with one aspect of the invention, the laser is preferably adapted and configured to transmit a distress signal in the second operating mode.
The invention also provides a method for making a conspicuity device. The method includes providing an elongate electroluminescent element, and bonding a plurality of layers of material to each other to define an encasement having an elongate compartment for receiving the elongate electroluminescent element.
In further accordance with the invention, the plurality of layers of material can include a base layer onto which the electroluminescent element is placed, and a lens layer that is placed on top of the base layer and the electroluminescent element. The base layer can be made from any suitable material, including a retroreflective polymeric material that may be photoluminescent, as described herein. If desired, the encasement may then be attached to a piece of base material. The base material may include any combination of webbing and elastic material as described herein. Preferably, the base material is fire resistant. By way of further example, the base material can include any suitable article of clothing, such as a jacket, a shirt, a pair of trousers or shorts, footwear such as boots or sneakers and headgear such as helmets, hats or headbands or a sash, among others.
The invention also provides a method of providing improved conspicuity in an environment rendered opaque by smoke and/or darkness. The method includes providing an illuminative device to an object to be given conspicuity, and causing the illuminative device to emit light having a wavelength equal to or shorter than about 550 nm. More preferably, the illuminative device emits light having a wavelength equal to or shorter than about 510 nm. If desired, the light emitted by the illuminative device may have a wavelength equal to or shorter than about 475 nm. By way of further example, the light emitted by the illuminative device may have a wavelength equal to or shorter than about 445 nm or 400 nm. As the wavelength of the emitted light progresses below 500 nm, the devices may be more useful in applications where it is desired to view an object from a long distance away. If desired, the illuminative device may include a laser, a lamp having an electroluminescent element and/or an LED lamp, among others.
The invention also provides a flashlight. The flashlight includes a direct current power source, a lamp operably coupled to the power source, and an electrical inverter operably coupled to the power source for converting direct current to alternating current.
In further accordance with the invention, the flashlight of the invention may include an electrical port operably coupled to the electrical inverter for supplying alternating current to another device. The flashlight can include a variety of direct current power supplies, such as conventional and/or rechargeable batteries, and the like. If desired, the flashlight can also include an electrical generator that can generate electricity and store it in a battery during periods of extended use. The generator can be used to generate power, for example, by shaking the flashlight, by turning a generating crank, and the like. Suitable examples of generating schemes are described, for example, in U.S. Pat. Nos. 6,994,450, 6,914,340, 6,563,269 and 6,322,233. Each of these patents is incorporated by reference herein in its entirety. If desired, the flashlight can also include a DC power port for powering a DC accessory, such as a laser as described herein.
In accordance with another aspect of the invention, a conspicuity device is provided including an electroluminescent lamp, and a flashlight operably coupled to the electroluminescent lamp; wherein electrical power is drawn from the flashlight to power the electroluminescent lamp.
In further accordance with the invention, the conspicuity device can further include an inverter adapted and configured to convert direct current to alternating current for powering the electroluminescent lamp. If desired, the inverter may be integrally formed with the electroluminescent lamp. Alternatively, the inverter may be integrally formed with the flashlight.
In accordance with still another aspect, the invention provides a lighting device including a light source having a spectral energy distribution that is specifically adapted and configured to substantially overlap the spectral sensitivity of the human eye in one or more viewing conditions.
In further accordance with the invention, the spectral energy distribution of the light source may be specifically adapted and configured to substantially overlap the spectral sensitivity of the human eye in photopic, mesopic and/or scotopic conditions. The overlap of the spectral distribution of the light source and the sensitivity of the human eye can be less than or equal to about 100%, about 95%, about 90%, about 85%, and so on in any suitable increments (e.g., of 1% or 5% for example) until the overlap ceases to have a performance advantage by virtue of the overlap. For example, there may only be a 20% overlap, but the 20% overlap may lie in a region of particular sensitivity of the human eye. For example, in darkness conditions, the human eye is most sensitive to light having a wavelength of about 507 nm. As such, a light having even a small portion of its spectral distribution (e.g., about 10%) at or near 507 nm may demonstrate significant visibility.
In further accordance with the invention, the lighting device may include an active lighting device and/or a passive lighting device. For example, if the lighting device is active, it may be selected from the group including (i) a running light for a car, (ii) an illuminated sign, (iii) an illuminated warning signal (iii) an interior building light, (iv) a street light, (v) a reading light, (vi) a flashlight (vii) a light emitting diode and (viii) electroluminescent material, among others. If the lighting device is passive, the device may include photoluminescent material and/or retroreflective material. If it is passive, the lighting device may selected from the group including (i) a surface of a motor vehicle, (ii) a road sign, (iii) a fence (iii) an interior surface of a building and (iv) paint, among others.
In further accordance with the invention, a method of constructing a lighting device is provided. The method includes providing an electroluminescent lamp, and selecting a power source for powering the electroluminescent lamp having a frequency and voltage output that will cause the electroluminescent lamp to have a spectral energy distribution that is specifically adapted and configured to substantially overlap the spectral sensitivity of the human eye.
In further accordance with the invention, the voltage and frequency of the power source may be selected such that the spectral energy distribution of the electroluminescent lamp is specifically adapted and configured to substantially overlap the spectral sensitivity of the human eye in photopic, mesopic and/or scotopic conditions.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the invention claimed.
The accompanying drawings, which are incorporated in and constitute part of this specification, are included to illustrate and provide a further understanding of the method and system of the invention. Together with the description, the drawings serve to explain the principles of the invention.
Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. The method and corresponding steps of the invention will be described in conjunction with the detailed description of the system.
The devices and methods presented herein may be used for myriad purposes. Generally, the devices described herein may be used for providing enhanced visibility in photopic, mesopic and/or scotopic conditions, as appropriate. The present invention is particularly suited for providing enhanced visibility in emergency situations involving smoke, haze and/or darkness.
The inability for the common helmet utility strap or tool band to adjust lengthwise presents several problems. Over time a loop of fixed length made of rubber or elastic material when conformed to a shape will lose its elasticity. This will eventually prevent the device from effectively maintaining its elastic tension around a helmet, for example. Typically, when this occurs the user must discard the device because it is ineffective. Moreover, the lack of tension that occurs directly compromises the safe keeping of tools or other devices reliant on the constant elastic tension required for effective mounting on a helmet. The novel and useful improvements described herein offer a significant improvement to conventional designs.
In accordance with one aspect of the invention, a tool band is provided including one or more loops for holding tools.
For purpose of explanation and illustration, and not limitation, a partial view of an exemplary embodiment of the tool band in accordance with the invention is shown in
As illustrated in
The inability for the common helmet utility strap to provide heat and flame resistance when in extreme conditions is based strictly on the very lack of heat and flame resistant properties of the materials used in its construction. When a conventional utility strap or tool band made from non-heat-resistant material (e.g., rubber or elastic) is exposed to heat and flame, it can easily loose its elasticity resulting in a loss of tension and decreasing or eliminating its efficacy as a tool band. The potential also exists for the helmet utility strap to completely fail by snapping or being burnt off.
The portions of tool band 100 may be made from a variety of materials. For example, the webbing portion 108 of the tool band 100 may be made at least in part from aramid fibers. For example, the webbing portion 108 may be made at least in part from KEVLAR™ material. A particular example of webbing can be one-inch wide KEVLAR™ webbing that passes the National Fire Protection Act (“NFPA”) 1981 Heat Test & Flame Test. Such a material can be a modacrylic blend including, for example, 83% KEVLAR™ material and 17% modacrylic material. Such webbing material may be obtained, for example, from Offray Specialty Narrow Fabrics, Inc., located in Chester, N.J. 07930 (Tel: (908) 879-3636. Providing a band 100 made from heat and flame resistant material presents a solution to the dilemma described above.
If desired, the elastic portion may also be made at least in part from aramid fibers. For example, the elastic portion may be made at least in part from NOMEX™ material. An example of a suitable NOMEX™ material includes one-inch wide NOMEX™ material that passes the NFPA 1981 Heat Test & Flame Test. Such material may be about 50% NOMEX™ material and about 50% elastic material. Such material can also be obtained from Offray Specialty Narrow Fabrics, Inc.
The inability for the common helmet utility strap to provide the safe keeping of tools is consistent with its very basic design. The common application of a helmet utility strap or tool band is to trap a tool between the material of the band and the surface of the helmet. The tension of the elasticity of the band is used to secure the tool against the helmet. Although very basic, this method of trapping a tool is actually very inefficient for a variety of reasons. For example, such a method of tool capture imposes significant wear on the elastic properties of the band itself and causes it to lose its elasticity more quickly. Moreover, merely trapping a tool between the band and the helmet does not guarantee that the tools will not shift during use, which can be very disconcerting when searching for a tool in one's headband in a very dark and/or smoky condition.
In order to address this deficiency in the art, as further depicted in
The ends 102, 104 of the tool band 100 may be attached to one another in a variety of manners, including hook and loop fasteners (e.g., Velcro® material), buckle mechanisms (e.g., Fastex buckles made from nylon), snaps, buttons, hooks and the like. In accordance with a preferred embodiment, a side release buckle 112 is provided having a male portion 112a and a female portion 112b. Suitable buckles may be obtained from Homa Locks, Inc., of Bethel, Conn. 06801 (Tel.: (203) 743-5913). Buckle 112 preferably includes a length adjustment and is preferably made from heat stabilized nylon 6/6.
By providing a tool band 100 that allows the opening and closing of the band provides better conformity of the band to a given helmet. Typically, mounting a conventional helmet utility strap requires the strap to be stretched over the top of the helmet to establish a secure fit. A band with a properly designed coupling, such as buckle 112 permits the helmet utility strap to work in conjunction with associated adjustability features to offer an optimal fit to the helmet. Moreover, if the user of a conventional helmet strap becomes snagged or entangled, for example, while in a burning building, the very life of the user is jeopardized by the fact that freeing oneself in such a situation is very difficult without having to remove one's helmet. However, by providing a coupling, the strap can merely be disengaged, facilitating the user's ability to free themselves from the dangerous condition without removal of the helmet, which can help avoid unnecessary exposure to heat and smoke.
The inability for the common helmet utility strap to mount on a helmet securely is consistent with its very basic design. A one piece circular band or strap which is made of a rubber or elastic material in many instances is unable to remain secured to a helmet for long periods of time based on its elastic tension alone. The lack of elasticity caused over time, the constant handling of a helmet and the vibrations experienced by a helmet all contribute to the loosening of a conventionally designed helmet strap. To further help mitigate these effects, self-adhesive tabs having hook and loop fasteners (e.g., Velcro® fasteners) 150 may be placed on the inside surface of tool band 100 of the helmet utility strap to prevent the strap from easily failing off a given helmet, should it become dislodged. A corresponding hook and loop fastener can be attached to the helmet of the wearer in a suitable location. In addition, other fasteners may be used in addition to hook and loop fasteners, such as snaps, hooks, buttons, tabs and the like.
In accordance with a further aspect of the invention, the tool band can be further provided with a conspicuity device attached thereto. The conspicuity device can include one or more active and/or passive lighting devices.
For purposes of illustration and not limitation, as depicted in
The electroluminescent lamp 200, examples of which are described in detail below, may be affixed to the webbing 108 by various means (e.g., stitching, adhesive, fasteners and the like) and be adapted and configured to emit light.
As further depicted in
As depicted in
The tool band 100 is preferably also provided with one or more power sources for powering active devices used in combination with the band. If desired, the tool band can have additional suitable tools mounted therein. Such tools can include, for example, one or more door wedges 600, lighting mechanisms, and wrenches 700, among others. If desired, a communication device 800, such as a radio, portable telephone and/or global positioning system can also be mounted in or integrated with the tool band 100.
As mentioned above, the invention provides a conspicuity device including an electroluminescent element.
For purposes of illustration and not limitation, as embodied herein, the a conspicuity device in the form of an electroluminescent lamp 200 is provided. Preferably, the lamp 200 has at least one elongate electroluminescent element 210 defining a longitudinal axis L and a transverse axis W. As depicted, for example, in
By using the “cell-connector” pattern as described above, the design of the lamp is optimized as compared to an electroluminescent strip 210 of constant width. Specifically, the disclosed “dashed” design requires energizing a smaller amount of surface area than a similar strip of uniform width. As a result, for a given amount of power, the intensity of the light transmitted is higher from lamp 200. As such, lamp 200 is brighter than if it had an element 210 of constant width along its length.
In further accordance with the invention, the elongate element can be a continuous, monolithic element (as depicted) or may be interrupted and formed from more than one piece of electroluminescent material. Suitable electroluminescent material may be obtained, for example, from MetroMark, Inc. of Minnetonka, Minn. 55343-8862 (Tel.: (800) 680-5556).
By way of further example, as illustrated in
Such electroluminescent material can be driven by an alternating current electrical power source at a particular voltage and frequency. The particular voltage and frequency selected will influence the color emitted by the electroluminescent material, and hence the spectral distribution of the light emitted by the electroluminescent material. For example, by increasing the frequency of the driving voltage, the light emitted by the electroluminescent element progresses toward the blue, higher energy end of the visible spectrum. The EL emission process generates energy only over a limited range and thus causes light to be emitted only over a limited range of wavelengths. The result is a relatively pure visible color with a width at half maximum for the emission spectrum of approximately 70 nm. The emission is limited to the visible wavelength range, so no energy is wasted in the near infrared.
The exemplary electroluminescent phosphors mentioned above come in a discrete set of colors. These may be described by the colors corresponding to the approximate wavelength of the maximum of their emission. For example, for operation at 110Vrms at 400 Hz, “blue” phosphors experience a maximum emission at about 460 nm, “blue-green” phosphors experience a maximum emission at about 499 nm, “aviation green” phosphors experience a maximum emission at about 510 nm, “green” phosphors experience a maximum emission at about 504 nm and “amber” phosphors experience a maximum emission at about 584 nm.
As mentioned above, the color of every electroluminescent lamp changes as a function of the driving frequency. The colors described in the preceding paragraph are measured at an excitation of 110Vrms, 400 Hz. A phosphor that is green at this point will become blue if the frequency of the drive is increased. For example, color changes will begin to become apparent as the frequency is increased to about 700 Hz and will become extremely pronounced at about 1000 Hz. Large relative changes in the voltage can also introduce slight alterations in the color, although the effect is much less pronounced than in the case of frequency changes. The voltage effect is most noticeable at low voltages.
A variety of shapes are possible for the electroluminescent element 210 of the electroluminescent lamp 200. A preferred embodiment of such a shape is depicted, for example, in
As further depicted in
The connector 230 preferably has a length along the longitudinal axis L that is less than the length along the longitudinal axis of at least one of the cells 220. If desired, the cells 220 may have an average length along the longitudinal axis L between about three inches and about one half of an inch. More preferably, the cells 220 have an average length along the longitudinal axis between about two inches and about one inch. Most preferably, the plurality of cells 220 have an average length along the longitudinal axis L of about one and one half inches. As depicted in
The connectors 230 can have an average length along the longitudinal axis L that is between about three quarters and about one quarter the length of an adjacent cell 220. More preferably, the connector 230 has an average length along the longitudinal axis L that is about one third the length of an adjacent relatively wide emitting segment. As depicted in
As further depicted, for example, in
Furthermore, as depicted in
As depicted, the electrical inverter 244 is interposed in a circuit between the battery(ies) 242 and the electroluminescent element 210. A variety of different inverters may be used. In accordance with one example, a IM-3 Inverter may be used, commercially available from Elam El Industries, Ltd., of Jerusalem, Israel. (Tel.: 02-5328888; website: www.elam.co.il). Such a housing 246 including an inverter 244 and battery compartment containing batteries 242 is depicted in
TABLE 1
Operating Characteristics of Exemplary
Power Supply With Inverter
Input
Input Current
Output Voltage
Frequency
(VDC)
(mA)
(Vrms)
(kHz)
2.5
30
80
3.7
2.5
38
72
3.0
2.5
40
70
2.7
3.0
40
96
3.8
3.0
47
85
3.0
3.0
50
81
2.8
Tolerance
+/−10%
+/−5%
+/−5%
As depicted in
In accordance with one embodiment, lamp 200 can emit light for more than about eight hours before the battery 242 requires charging or replacement. In accordance with another embodiment, lamp 200 can emit light for more than about ten hours during an operating mode that provides constant illumination. In accordance with still another embodiment of the invention, lamp 200 can emit light for more than about forty hours during an operating mode that provides intermittent illumination.
In further accordance with the invention, the device may include an encasement adapted and configured to house the electroluminescent element.
For purposes of illustration and not limitation, as embodied herein and as depicted in
As mentioned above, the encasement 250 preferably includes a base layer 260 upon which the electroluminescent element 210 is positioned. Base layer 260 preferably includes retroreflective material. For example, the base layer 260 may include a plurality of microprism reflective elements 262 integrally bonded to a polymeric matrix. In accordance with one embodiment, the retroreflective material of the base layer 260 has a retroreflective value in excess of 350 cd/lux/m2 (cpl) when measured in accordance with NFPA 1971, 2000 edition. Preferably, the layer 260 has a retroreflective value of about 650 cd/lux/m2 (cpl). The base layer 260 may also include a layer 264 of fabric-reinforced polymeric backing material. A suitable commercially available material includes, for example, REFLEXITE® material, such as that described in U.S. Pat. Nos. 4,801,193, 4,244,683, 4,243,618, 4,202,600, 4,555,161, 5,171,624, 5,264,063 and/or 5,229,882. All of these patents are incorporated by reference herein in their entireties. Such material is commercially available from Reflexite Americas of New Britain, Conn. 06051 (Tel.: (860) 223-9297) in the form, for example, of one-inch wide yellow retroreflective material. This REFLEXITE® material passes the NFPA 1981 Heat Test & Flame Test and demonstrates self-extinguishing properties.
By way of further example, if desired, base layer 260 of the encasement 250 may additionally or alternatively include photoluminescent retroreflective material. Such materials are described, for example, in U.S. Pat. Nos. 5,415,911, 6,159,878, 6,569,786, and 6,656,566. Each of these patents is incorporated by reference herein in its entirety. The photoluminescent retroreflective material is preferably charged by exposure to ultraviolet light. Preferably, the retroreflective photoluminescent material includes photoluminescent elements including strontium aluminate. Other materials, such as zinc sulfide photoluminescent elements may also be used. Comparatively speaking, strontium aluminate retroreflective material tends to have a higher brightness and longer afterglow, which may be desirable in certain applications. These photoluminescent crystals (e.g., strontium aluminate) may be are cast into a polymeric material such as a pliable PVC vinyl, and used in a manner similar to the REFLEXITE® material. Such material is commercially available, for example, from Lanxi Minhui Photoluminescent Co., Ltd., of No. 18, Yuezhong Street, Lanxi, Zhejiang Province, China (Tel.: 86-579-8948789/8948900/8988198; website:http://www.mphotoluminescent.com).
The Lanxi Minhui photoluminescent retroreflective vinyl has a reflective value of 650 cd/lux/m2 (cpl). Its flame resistance and temperature resistance complies with all the requirements of the NFPA 1971, 2000 edition and has a melting point of approximately 500° F. High resistance against deformation in high temperature enables this material to maintain its performance. One of the reasons for this stability is that this product has been stably crystallized at a high temperature so that the photoluminescent property can be preserved with a superior anti chemical resistance in high (e.g., 1,200° F.) and low (−20° F.) temperatures. The photo-luminescent and illuminant performances of this material are preserved semi-permanently with no deterioration even under direct sunlight. In addition, this material has a resistance to a variety of chemicals such as heptane, MeOH, NaOH, gasoline, kerosene, and mineral oil without any evidence of blistering or dissolving.
As indicated above, charging the photoluminescent retroreflective material described above can occur in various ways. For example, exposure to sunlight or flame can cause the material to fully charge in about five minutes. In overhead neon lighting it can take about fifteen minutes for the material to fully charge. Under exposure to a sixty watt light bulb it can take about forty-five minutes for the material to fully charge.
An individual wearing the utility strap/tool band 100 including lamp 200, for example utilizing this retroreflective photoluminescent technology may benefit dramatically as the luminescent light source could decrease the need for battery power, as it may be decided that a quality after-glow is all that is required for conspicuity. More importantly, the illumination generated by the electroluminescent element 210 will be able to charge its own retroreflective photoluminescent encasement 250. Thus, in the instance that the power source to operate the electroluminescent element 210 dies, the charge gained by the photoluminescent retroreflective encasement 250 presents a unique and effective redundancy. Moreover, the introduction of flame in work environments where some users (e.g., firefighters) can present a benefit to the user, in that the UV light generated from flame can charge the photoluminescent material of the encasement 250.
The particular photoluminescent retroreflective material described herein may be light yellow-green in color, and may similarly glow yellow-green in color, for example. As indicated above, the main component is preferably alkaline earth metal aluminate oxide. Its exciting wavelength is between about 200 nm and about 450 nm. The average size of the photoluminescent particles is between about 45 microns and about 65 microns. Water resistance of the material is in excess of 1000 hours, and the length of the afterglow may be in excess of 3000 minutes. The corresponding brightness and afterglow may be as follows. About two minutes after charging, the material exhibits a brightness of about 1880 mcd/m2. About ten minutes after charging, the material exhibits a brightness of about 475 mcd/m2. About thirty minutes after charging, the material exhibits a brightness of about 165 mcd/m2. About sixty minutes after charging, the material exhibits a brightness of about 80 mcd/m2.
A clear lens layer 270 is then affixed to the base layer 260, trapping the electroluminescent element 210 between the two layers. The lens layer 270 is preferably formed from a vinyl material. Even more preferably, the lens layer 270 is heat resistant, and permits passage of visible light and ultraviolet light therethrough without significantly altering its properties. This is of particular importance if ultraviolet light is needed to charge a base layer 260 including photoluminescent retroreflective material.
For purposes of further illustration only, various views of device 100 illustrated in
In accordance with one embodiment of the invention, the electroluminescent lamp 200 may be adapted and configured to emit a majority of photons in a wavelength range surrounding about 500 nm. Example I below has been carried out to show this and further illustrate the invention claimed, and is not intended to limit the invention disclosed herein in any way.
Light may be precisely characterized by giving the power of the light at each wavelength in the visible spectrum. The resulting spectral power distribution (SPD) contains all the basic physical data about the light and serves as the starting point for quantitative analyses of color. The SPD can be measured by a spectrophotometer.
The spectral energy distribution of an exemplary embodiment of a lamp 200 made in accordance with the teachings herein was tested to determine its spectral energy distribution by an independent lighting testing laboratory. The spectral distribution test was performed with an input voltage to the inverter 244 of about 2.85 V(DC), an input current of about 144 mA (DC) an input power of 410 mW. A complete assembly with an encasement 250 was tested, having lens layer 270 in place. To perform the test, the following equipment was used by an independent testing laboratory: (i) a Xitron 2503 Power Analyzer, (ii) an Optronic Laboratories OL770 Spectroradiometer, (3) an ITL (Independent Testing Laboratories, Boulder, Colo.) 30″ Diameter integrating sphere and (4) a Topward 3306D DC power supply. The sample device was mounted inside of the integrating sphere and operated at 2.85 V(DC) until stabilization occurred. The relative spectral distribution and electrical data were then recorded. In order to measure the mean performance, five data sets were recorded and averaged. Readings were taken with the sample operating in a 25+/−5 degree Celsius free air ambient condition. Applicant has been informed that all data taken is traceable to the National Institute of Standards and Technology.
The data resulting from the independent testing is depicted in Table 2 below and is plotted in
TABLE 2
Measured Spectral Distribution of
Exemplary Electroluminescent Lamp
Percent of Integrated
Wavelength
Radiant Flux for each
(nm)
5 nm wavelength window (%)
380
0.34749
385
0.38194
390
0.39478
395
0.48253
400
0.44254
405
0.30381
410
0.30608
415
0.41334
420
0.66301
425
0.99008
430
1.39020
435
1.80125
440
2.19734
445
2.58515
450
2.90591
455
3.21744
460
3.49706
465
3.72746
470
3.94573
475
4.18883
480
4.32491
485
4.48174
490
4.57953
495
4.63655
500
4.63298
505
4.58236
510
4.44016
515
4.27734
520
4.02709
525
3.70739
530
3.35136
535
2.96975
540
2.60528
545
2.23733
550
1.90088
555
1.59871
560
1.32491
565
1.08739
570
0.89697
575
0.72165
580
0.59057
585
0.48425
590
0.38872
595
0.31372
600
0.25337
605
0.20957
610
0.16386
615
0.13685
620
0.11056
625
0.09016
630
0.07892
635
0.06722
640
0.06078
645
0.04946
650
0.03827
655
0.03579
660
0.03565
665
0.03339
670
0.01982
675
0.02021
680
0.02657
685
0.01747
690
0.01823
695
0.01608
700
0.01361
705
0.01577
710
0.01059
715
0.01597
720
0.00812
725
0.01237
730
0.01397
735
0.01156
740
0.01008
745
0.00793
750
0.01257
755
0.00770
760
0.00944
765
0.00613
770
0.00893
775
0.00904
780
0.00045
As can be seen, the lamp 200 that was tested demonstrated a maximum of light output near 500 nm. This data is actually based on a “green” EL lamp as described above that would be adapted and configured to have a peak emission at 504 nm when driven at 110Vrms at 400 Hz. The shift in the spectrum is believed to be due to running the lamp at several kHz. For the reasons discussed below, it is believed that the specific spectral distribution of lamp 200 is particularly advantageous in low light and/or smoky conditions.
The human visual system comprises two types of photoreceptor (cones and rods), which operate under different lighting conditions. In fact, there are different experimentally derived curves that demonstrate the sensitivity of the retina to light under different lighting conditions. A first curve describes “photopic” conditions (when light is plentiful) and a second curve describes “scotopic” conditions (when light is scarce). As one moves from photopic to scotopic conditions or vice versa, there is also a third curve, called the “mesopic” curve. Mesopic vision applies quite commonly (e.g. under road lights at night). During the daytime (i.e., a “photopic” condition), nearly all photopigments in the rods are effectively “bleached”. At this time, the human eye sees color and acuity is high (because of foveal vision). At night, “scotopic” vision is generally determined by rods. At this time, the human eye generally does not see color and acuity is generally low. In effect, the human eye has two functionally separate retinas—one for photopic conditions, and one for scotopic conditions.
With regard to cones, there are three types of color-sensitive cones in the retina of the human eye, corresponding roughly to red, green, and blue sensitive detectors. Experiments known in the art have yielded response curves for three different kind of cones in the retina of the human eye. The “green” and “red” cones are mostly packed into the fovea centralis. By population, about 64% of the cones are red-sensitive, about 32% green sensitive, and about 2% are blue sensitive. Interestingly, the “blue” cones have the highest sensitivity and are mostly found outside the fovea. The shapes of the curves are obtained by measurement of the absorption by the cones, but the relative heights for the three types are set equal for lack of detailed data.
Notably, at extremely low intensities of stimuli, when only rods are stimulated, the retina shows a variable sensitivity to light according to its wavelength, being most sensitive at about 500 nm, the absorption maximum of the rod visual pigment, rhodopsin.
The light sensitivity of the normal human eye has been studied extensively in scientific literature. The response of the eye as a function of frequency is called the luminous efficacy of the eye. It has been tabulated for both the light-adapted (“photopic”) case and the dark-adapted (“scotopic”) case. Table III below depicts the luminous efficacy of the human eye for the “scotopic” and “photopic” cases.
TABLE III
Luminous Efficacy Table for Human Retina
Photopic
Photopic
Scotopic
Scotopic
Wavelength
Luminous
Conversion
Luminous
Conversion
λ (nm)
Efficacy Vλ
lm/W
Efficacy Vλ
lm/W
380
0.000039
0.027
0.000589
1.001
390
0.000120
0.082
0.002209
3.755
390
0.000120
0.082
0.002209
3.755
400
0.000396
0.270
0.009290
15.793
410
0.001210
0.826
0.034840
59.228
420
0.004000
2.732
0.096600
164.220
430
0.011600
7.923
0.199800
339.660
440
0.023000
15.709
0.328100
557.770
450
0.038000
25.954
0.455000
773.500
460
0.060000
40.980
0.567000
963.900
470
0.090980
62.139
0.676000
1149.200
480
0.139020
94.951
0.793000
1348.100
490
0.208020
142.078
0.904000
1536.800
500
0.323000
220.609
0.982000
1669.400
507
0.444310
303.464
1.000000
1700.000
510
0.503000
343.549
0.997000
1694.900
520
0.710000
484.930
0.935000
1589.500
530
0.862000
588.746
0.811000
1378.700
540
0.954000
651.582
0.655000
1105.000
550
0.994950
679.551
0.481000
817.700
555
1.000000
683.000
0.402000
683.000
560
0.995000
679.585
0.328800
558.960
570
0.952000
650.216
0.207600
352.920
580
0.870000
594.210
0.121200
206.040
As can be seen, peak sensitivity for the scotopic case is at about 507 nm as viewed by an observer. Notably, this peak is extraordinarily close to the peak of 500 nm for lamp 200. Stated another way, the spectral distribution of the lamp is extremely similar to the sensitivity range of the human eye under scotopic conditions. As such, lamp 200 is particularly well suited performance in a dark and/or smoky environment. While the electroluminescent lamp 200 is adapted and configured to emit generally blue light, a significant amount of light having generally green wavelengths are also preferably present. Such emission can be ensured by selecting an appropriate frequency for powering the electroluminescent lamp, as described herein.
As is known in the art, photons lose energy as they traverse a medium, such as a smoky medium. As such, having a lamp 200 or other lighting device with a spectral power distribution having a maximum at an energy slightly higher than that the maximum sensitivity of the human eye can be advantageous, as the light will lose energy as it passes through the medium, permitting enhanced detection by an observer.
It is believed that the above conclusions are bolstered by the fact that the intensity of the light output of lamp 200 is low, yet surprisingly visible. In actual use, lamp 200 has very little glare and is not blinding, even at very close distances (e.g., six inches). Yet, lamp 200 is still highly visible in dark smoky environments that do not permit a firefighter to see their hand in front of their face.
The light output of an exemplary lamp 200 was tested to quantify the intensity of the output. The testing was performed by an independent laboratory. Lamp 200 was attached to tool band 100 and centered at the front of a helmet. The helmet, in turn, was positioned in a testing jig adapted and configured to measure the light intensity put out by the lamp 200 at various points of an imaginary “sphere” surrounding the helmet. The element 210 of the lamp 200 was centered at the “equator” of the imaginary “sphere” at 0 degrees longitude on the sphere (e.g., the “prime meridian” of the sphere). Intensity measurements were then taken over one hemisphere, starting at 0 degrees longitude and proceeding to 180 degrees longitude in increments of 45 degrees longitude. Along each line of longitude, 21 light intensity measurements were taken between 0 degrees (i.e., the “South pole” of the sphere) and 180 degrees (i.e., the “North pole” of the sphere) in angular increments of five degrees. A flux measurement integrated about the vertical axis of the sphere was measured for angular increments of every ten degrees of latitude and expressed in lumens. The measured intensity values and flux values are reported below in Table IV:
TABLE IV
Spherical Candela Distribution and Flux of Lamp
Candela Distribution
0
45
90
135
180
Vertical Angle
degrees
degrees
degrees
degrees
degrees
Flux
(degrees)
longitude
longitude
longitude
longitude
longitude
(lumens)
0 (south pole)
0
0
0
0
0
5
3
1
1
1
0
0
15
3
2
2
1
0
0
25
3
3
6
2
0
2
35
3
27
26
5
0
9
45
37
55
44
9
0
24
55
86
82
57
15
0
44
65
110
108
68
19
0
61
75
123
121
75
21
0
72
85
129
127
78
22
0
79
90
130
126
78
21
0
95
129
124
76
20
0
79
105
126
121
74
20
0
74
115
115
109
67
18
0
62
125
100
95
60
15
0
49
135
81
76
49
11
0
34
145
61
54
35
8
0
19
155
36
31
19
5
0
9
165
16
12
7
2
0
2
175
6
4
2
2
0
0
180 (northpole)
0
0
0
0
0
* Note:
Divide all Candela and Lumen values by 1000
These data are also plotted in
The data summarizing the zonal lumens over the sphere are presented below in Table V. The amount of light output in lumens is integrated for each vertical angular section. For example, the first entry of “0-30” integrates the total number of lumens passing through the area of the surface of an imaginary sphere defined between the south pole (0 degrees) and 30 degrees of latitude above the south pole, and so forth. The right column of Table V depicts the percentage of total lumens passing through each section.
TABLE V
Integrated Zonal Lumen Summary
Zonal Lumen Summary
Zone
Lumens
Percent of Total Light Output
0-30
2
0.3
0-40
11
1.7
0-60
78
12.6
0-90
290
46.9
90-120
215
34.7
90-130
264
42.7
90-150
317
51.3
90-180
328
53.1
0-180
618
100.0
* Note:
Divide all Candela and Lumen values by 1000.
As can be seen from the data in Table V above, 46.9% of the total light output was received by the lower “hemisphere” while the remaining 53.1% of the total light output was received by the upper “hemisphere”.
Field experience has shown that lamp 200 is even visible in a “black smoke” condition from up to about six feet away. This distance is sufficient for firefighters to see each other that are progressing through a burning structure in close proximity to one another.
In accordance with still a further aspect of the invention, an article of clothing is provided having an electroluminescent lamp as described herein.
For purposes of illustration and not limitation, as embodied herein, and as depicted in
In accordance with one embodiment, it is possible to provide lamp 200 with a hook and loop fastener backing (e.g., 150) so that lamp 200 is removable from the article of clothing or other article to permit machine washing of the article of clothing. After the article has been cleaned, lamp 200 can be reapplied and the power supply 240 can be returned to its dedicated or other pocket.
It will also be appreciated that the shape of electroluminescent element 210 can be of any suitable shape. For example, element 210 can be shaped to form designs, words, characters and athletic logos, such as the Nike® brand “swish” logo. Preferably, element 210 is driven as described herein to have a spectral energy distribution similar to those depicted in the Examples above.
By way of further example, as depicted in
The invention also provides a conspicuity device including a band adapted and configured to be mounted to an object and a laser beacon mounted on the band.
For purposes of illustration and not limitation, as embodied herein and as depicted in
As depicted in
Moreover, the beam 350 emitted from the laser beacon 300 can have a variety of shapes and sizes. For example, the laser beacon 300 can emit a substantially collimated beam 350 of light or a diverging beam of light, as desired. The beam 350 is preferably sufficiently wide to permit suitable use as a signal beacon for observers relatively nearby when used in indoor applications (e.g., 10-100 feet), and/or observers far away in outdoor applications (e.g., 100-10000 feet). For example, in accordance with one embodiment, the laser beacon 300 is preferably adapted and configured to emit a beam 350 having a diameter in excess of about one centimeter at a point in the beam more than five feet from the laser.
In further accordance with the invention, as depicted in
In operation, beam 350 can make air in the path of the beam effectively “glow.” For example, if a photon of appropriate wavelength interacts with electron of a gas molecule in the air, the electron's energy can be raised to a higher quantum state. Shortly thereafter, the electron will return to its ground state, emitting a photon in the process. It will be appreciated that the light so emitted by the electrons in gas molecules present in air is not “laser” light as it is diffuse, however, it may have a color characteristic similar to the laser beam shining through it. By way of further example, beacon 300 can be outfitted with appropriate optics to supply a planar or conical moving beam. Such beams are highly visible in low light and/or smoky conditions.
If desired, the housing 340 of the laser beacon 300 may define a compartment 346 for receiving a battery 348 for powering the laser beacon 300. Additionally or alternatively, a power lead 347 can be provided for providing power to another active electrical accessory on tool band 100 and/or for drawing power from an external power source, such as light 400 described herein. If desired, the laser beacon 300 may also be configured to operate in a plurality of operating modes by way of a switch 349 as with the electroluminescent lamp 200. For example, the laser beacon 300 can be operated in a first operating mode wherein the laser is on constantly, and a second operating mode wherein the laser blinks. If desired, the laser beacon 300 may be adapted and configured to transmit a signal in the second operating mode, such as a distress signal and/or an identification signal that uniquely identifies the user of the beacon. Such a distress or identification signal can be particularly useful if laser beacon 300 is being used by an individual in a forest fire. The beam 350 of laser can be seen by rescue aircraft from many miles away, and can facilitate pinpointing the location of such an individual if the individual's global positioning system malfunctions.
An example of a suitable laser flare is the Green Rescue Laser Flare® commercially available from Greatland Laser, LLC of Anchorage, Ak. Examples of such lasers are described, for example, in U.S. Pat. Nos. 6,688,755, 6,295,007, 6,280,057, 6,163,247 and 6,007,219. Each of these patents is incorporated by reference herein in its entirety. Such device is an FDA approved Class III-A laser under 5 mW of power designed to signal persons at a distance. This laser can be legally used as a distress signal in an emergency, and can also be used for training under established Federal rules. The Rescue Laser Flare® is visible at distances of up to thirty miles, and demonstrates effective conspicuity and has effectively been able to get the attention of search and rescue pilots in various case by case accounts. The ability, for example, of a forest fire fighter to effectively signal a rescue party up to 30 miles (48 km) away, depending on atmospheric conditions; by way of a helmet mounted tool band 100 can actually be critical to survival. Embodiments of the Rescue Laser Flare® are waterproof up to 80 feet, and made from machined aircraft aluminum and anodized for corrosion resistance. The laser diode lasts about 5,000 hours prior to failure. This device can be safely operated with persons at a distance greater than 13 feet (4 meters). The laser can operate continuously for over five hours in a constant mode or 10 hours in a blink mode using fully charged batteries. The specifications of this particular device are presented in Table VI below:
TABLE VI
Range
25-30 Miles
Output power
55 mW
Class
III-A
Operating voltage
3 V
Output model
CW
Average loop
<550 mA
Battery source
2xAAA Batteries
Dimensions
13 × 143 mm
Laser lifetime
3000-5000 hours
Battery lifetime
2.5 Hours
Crystal efficiency
Very good to excellent
Beam divergence
<1.2 mRad
It will be appreciated that while this laser does not embody all of the features described herein (for example, optical beam divergence and the like), this or a similar laser may be modified accordingly.
This laser technology is believed to be helpful in situations where there is low visibility due to smoke. For example, in many instances, the only way to “see” a laser, with the use of a laser's beam, is to shine it through a cloud of smoke, chalk dust, mist, etc. in a dimly-lit space. The small particles in the cloud act as tiny diffuse surfaces which scatter part of the beam toward your eyes. Dust particles usually create a sparkling effect as they float through the beam. Technically, what one is actually seeing are the particles in the cloud, not the beam itself. Therefore, in shorter distances such as 10 to 30 Feet, less powerful lasers can offer emergency service workers the ability to help to target themselves so that others can locate them in a smoke condition more easily. This will enable those entering into smoke filled environments to have better orientation of each other helping to prevent anyone from getting lost.
This Green Rescue Laser Flare® can be attached to band 100 in a variety of ways. For example, it may simply be mounted in a loop 114 as described herein. By way of further example, it may be enclosed in a cloth encasement or pouch. By way of further example, laser beacon 300 may be mounted on an adjustable platform or fixture 310, such as a pivoting bracket and/or a plastic encasement that can adjust to various positions as depicted in
If desired, as embodied herein, an electroluminescent lamp (such as lamp 200) may be mounted on the band 100 to be used in combination with laser 300. Using laser 300 in combination with lamp 200 can be particularly advantageous. While each device can be used to support the same function (e.g., locating a nearby individual), the laser 300 can also be used to locate an individual that is far away. An embodiment of such an arrangement is depicted in
As is further depicted in
As indicated above, work light 400 is preferably either a flashlight, such as a compact torch flashlight or a compact lamp. A compact torch flashlight ranging from about 4 to 5 inches in length can easily mount on tool band 100 permitting the projection of work illumination in front of the user of band 100. Attachment devices may be used for selective directional targeting that preferably permits illumination of the space in front of the user. Attachment can be accomplished in a variety of ways. It will be appreciated that the work light 400 will preferably be positioned on the right or left side of the user on band 100 thereby directing its beam forward. In accordance with one example, a loop 114 can be provided defining a passage therethrough along the direction of band 100 that is adapted and configured to hold light 400 securely in place. A molded clip and bracket may also be used that allows removability of light 400 and/or aiming of the light. Moreover, a work light 400 can be fully integrated into band 400 having replaceable batteries and/or a removable battery pack.
An example of one suitable torch flashlight that may be used, is a compact torch flashlight called the Helm-A-Lite™ Compact Torch commercially available from the Helm-A-Lite company in Pointe-Claire, QC, Canada (Tel. (514) 426-9266; website: www.helmalite.com). This torch flashlight is about four inches in length and projects a beam of light from a one watt lamp including light emitting diodes (“LED's”). The flashlight housing is made from heat and flame resistant polycarbonate, is water proof, impact resistant and safe to use. This particular torch flashlight is powered with 3 AAA batteries and has a burn time of about 15 hours.
In accordance with another embodiment of the invention, as depicted in
An example of a suitable lamp 400 is a compact multiple LED lamp system called the Foxfury™ Signature model, commercially available from FoxFury Action Lighting (NOAH Systems LLC) of Vista, Calif. (Tel.: (760) 945 4231; website: www.foxfury.com). Certain aspects of this lamp are described in U.S. Pat. No. 6,966,668, which is incorporated by reference herein in its entirety. The commercial embodiment of this lamp 400 is depicted in
In accordance with one embodiment of the invention, as depicted in
Work light 400 may further include an electrical port 440 operably coupled to the electrical inverter 430 for supplying alternating current to another device, such as electroluminescent lamp 200. Light 400 can include a variety of direct current power supplies 410, such as conventional and/or rechargeable batteries, and the like. If desired, work light 400 can also include an electrical generator 450 that can generate electricity and store it in battery and/or a capacitor during periods of extended use.
The generator 450 can be used to generate power, for example, by shaking the work light 400 or a removable portion of work light 400 containing the generator and battery(ies) or capacitor, by turning a generating crank, and the like. Suitable examples of generating schemes are described, for example, in U.S. Pat. Nos. 6,994,450, 6,914,340, 6,563,269 and 6,322,233. Each of these patents is incorporated by reference herein in its entirety. If desired, the light 400 can also include a DC power port 442 for powering a DC accessory, such as laser beacon 300 described herein. If desired, inverter 430 can be integrally formed with lamp 200 or band 100 and can be plugged into light 400 to obtain DC power to power the lamp 200 by way of inverter 430.
The utility strap/tool band 100 for helmets provided herein can be considered to be a system wherein an electroluminescent illuminated strip (e.g., 200) compliments many applications which may involve the use of other technologies. Although tool band 100 serves primarily as a conspicuity device, an objective of tool band 100 outside of providing conspicuity is to assist users in carrying or incorporating other functional tools into band 100 to facilitate achievement of a myriad of task oriented goals. As depicted, the electroluminescent lamp 200 integrated into tool band is preferably a permanent fixture (but could be removable, if desired). This uniqueness of the design of band 100 embodied herein offers a variety of components that can be easily plugged-in or removed from band 100, thereby providing a modular system having interchangeable components. As will be appreciated, the active electrical components contained by band 100 may each have their own power source, or may share a power source, as appropriate. It will also be appreciated that while a helmet band is a preferred embodiment, tool band 100 and all of its features described herein can be embodied as a belt for wearing around a user's midsection, arms, legs, neck or head, as appropriate. By way of further example, tool band may also be configured for use as a sash or a utility vest, among other configurations.
For example, an utility strap/tool band 100 for a helmets with an integrated electroluminescent lamp 200 may be modularly combined with (i) work lamp illumination, (ii) work torch illumination, (iii) a laser beacon (e.g., 300), (iv) an electrical inverter and (v) a conventional or rechargeable battery pack, among other features, such as a global positioning device, a two-way radio, a portable telephone, an electrical generator, and the like. Illustrations of some of these concepts are present in
Alternatively, many of the interchangeable components described above can also be designed to be an integrated, permanent fixture of band 100. Preferably, in such a configuration, most or all of the components can operate from a single power source such as a battery pack. Advanced flashlight designs can improve functionality as a specially designed torch or lamp can incorporate an inverter and/or a generator within its housing as described herein, enabling a flashlight to have a AC and DC output. It is also within the scope of the invention to provide for an integrated flashlight, inverter, and laser.
Additional embodiments of devices made in accordance with the invention are further disclosed in
As depicted, a plurality of power ports 3800 are provided for powering accessories. Ports may be direct current (“DC”) ports in direct electrical communication with battery 3500 and/or alternating current (“AC”) power ports in electrical communication with battery 3500 by way of inverter 3344. Housing 3300 also includes a switch 3350 that may power the AC port and/or the DC port. As will be appreciated, additional AC or DC ports may be provided. Switch 3350 is preferably a three way switch that can operate inverter in an on/off, constant on and blink mode, particularly for powering device 200. However, other accessories such as work lights or laser beacons can be operated in blink mode for conspicuity and/or to conserve electrical power.
The structure of power supply housing 3300 includes a back panel 3340 that fits into a front housing portion 3360. As depicted, back panel 3340 fits into the back of front housing portion 3360. A tab 3342 provided along one edge of back panel 3340 mates with a slot 3362 defined in front housing portion 3360. Two screws 3900 are used to hold back panel in position. As depicted in
As depicted in
Moreover, such a kit may be used as a stationary device that is mounted in a window, such as in a home in a child's room. The conspicuity device may be activated, for example, by a smoke detector or manually. For example, housing 3300 may include an acoustically activated switch 3500 that turns on when a nearby smoke detector sounds an alarm. Thus, as a result of the smoke alarm being activated, a device (e.g., 200, 300) may activate to alert an emergency worker arriving on the scene of the location of possibly sleeping and/or unconscious individuals.
Device 200 may also be integrated into a fire alarm and activated when the alarm activates to provide a visual signal to help occupants of a building (or vehicle) physically orient themselves to facilitate escaping from a dangerous situation. Device 300 may be similarly integrated, and point its beam 350 in the direction of an escape route.
Most notably, the shape of housing 4300 differs from that of housing 3300. For example, housing 4300 has a contoured V-shape, clearly depicted in the top view of
Housing 4300 also includes an inclined upper surface inclined along the direction of the front portion 4360 (about 25°) of the housing and a side portion 4380 of the housing (angle “α”) as illustrated in
Housings 3300, 4300, 240 are all preferably waterproof and include suitable gasketing about peripheries (e.g., gasket 3390 in
Moreover, power supply housings depicted herein (e.g., 3300, 4300) may be used to power other accessory devices (e.g., two-way radios, portable telephones, infrared cameras and the like) as desired.
As depicted in
As can be seen, ergonomically, power button 4350 of housing 4300 is angulated so that it is easy for a user to reach when wearing the helmet 5500.
As will be appreciated, the modular system provided herein may further include a charger for battery 3500, 4500. Suitable chargers are known in the art. The modular design provided herein permits ready replacement of a portion of the system that is not functioning, thus eliminating the need to replace or repair the entire system.
The invention also provides a method of providing improved conspicuity in an environment rendered opaque by smoke and/or darkness.
For purposes of illustration and not limitation, the method includes providing an illuminative device (such as lamp 200) to an object to be given conspicuity, and causing the illuminative device to emit light having a wavelength equal to or shorter than about 550 nm. More preferably, the illuminative device emits light having a wavelength equal to or shorter than about 510 nm. If desired, the light emitted by the illuminative device may have a wavelength equal to or shorter than about 475 nm. By way of further example, the light emitted by the illuminative device may have a wavelength equal to or shorter than about 445 nm or 400 nm. As the wavelength of the emitted light progresses below 500 nm, the devices may be more useful in applications where it is desired to view an object from a long distance away. If desired, the illuminative device may include a laser beacon (e.g., 300), a lamp having an electroluminescent element (e.g., 200) and/or an LED lamp (e.g., 400), among others.
In accordance with still another aspect, the invention provides a lighting device including a light source having a spectral energy distribution that is specifically adapted and configured to substantially overlap the spectral sensitivity of the human eye in one or more viewing conditions.
For purposes of illustration and not limitation, any suitable light source can be used, including passive or active. Suitable active light sources may include a laser beacon (e.g., 300), a lamp having an electroluminescent element (e.g., 200) and/or an LED lamp (e.g., 400), among others.
The sensitivity of the human eye in scotopic conditions was discussed above in Example I. However, in photopic conditions, the human eye is sensitive to different, longer wavelengths. As indicated in Table III above, in photopic conditions, the human eye is most sensitive to a wavelength of about 555 nm. Accordingly, lighting devices are provided herein that are tailored to the sensitivity of the human eye in photopic conditions and mesopic conditions as well as scotopic conditions.
The spectral energy distribution of the light source may be specifically adapted and configured to substantially overlap the spectral sensitivity of the human eye in photopic, mesopic and/or scotopic conditions. The overlap of the spectral distribution of the light source and the sensitivity of the human eye can be less than or equal to about 100%, about 95%, about 90%, about 85%, and so on in any suitable increments (e.g., of 1% or 5% for example) until the overlap ceases to have a performance advantage by virtue of the overlap. For example, there may only be a 20% overlap, but the 20% overlap may lie in a region of particular sensitivity of the human eye. For example, in darkness conditions, the human eye is most sensitive to light having a wavelength of about 507 nm. As such, a light having even a small portion of its spectral distribution (e.g., about 10%) at or near 507 nm may demonstrate significant visibility.
As mentioned above, the lighting device may include an active lighting device and/or a passive lighting device. By way of further example, if the lighting device is active, it may be selected from the group including (i) a running light for a car, (ii) an illuminated sign, (iii) an illuminated warning signal (iii) an interior building light, (iv) a street light, (v) a reading light, (vi) a flashlight (vii) a light emitting diode and (viii) electroluminescent material, among others. If the lighting device is passive, the device may include photoluminescent material and/or retroreflective material. If it is passive, the lighting device may selected from the group including (i) a surface of a motor vehicle, (ii) a road sign, (iii) a fence (iii) an interior surface of a building and (iv) paint, among others.
It will be appreciated that device 200 may be applied to a variety of objects, such as bicycles, baby strollers (e.g.,
For purposes of illustration, and not limitation, as embodied herein,
The methods and devices provided by the present invention, as described above and shown in the drawings, provide for conspicuity and safety devices with superior properties as described herein. It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention described herein without departing from the spirit or scope of the invention. Thus, it is intended that the present invention include modifications and variations that are within the scope of the appended claims and their equivalents.
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